CN105251368A - Alkali cleaning combined agent suitable for inorganic ceramic membrane - Google Patents
Alkali cleaning combined agent suitable for inorganic ceramic membrane Download PDFInfo
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- CN105251368A CN105251368A CN201510783802.9A CN201510783802A CN105251368A CN 105251368 A CN105251368 A CN 105251368A CN 201510783802 A CN201510783802 A CN 201510783802A CN 105251368 A CN105251368 A CN 105251368A
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Abstract
The invention discloses an alkali cleaning combined agent suitable for an inorganic ceramic membrane. The alkali cleaning combined agent is prepared from, by weight, 54-65% of sodium hydroxide, 30-43% of sodium carbonate and 3-5% of DMAD surfactant. According to the alkali cleaning combined agent, the proportions of all components in the formulation can be adjusted timely according to categories of inorganic ceramic membranes and practical sewage properties, and compared with a traditional membrane cleaning agent, the alkali cleaning combined agent is easier to operate and better in cleaning effect. DMAD serves as the surfactant, performance is good, and different from sodium dodecyl sulfate, DMAD is more environmentally friendly, easy to degrade and free of secondary pollution to the environment. The alkali cleaning combined agent can better respond to various kinds of polluted water and various inorganic ceramic membranes by adjusting the proportions of main ingredients in the formulation, and is wider in application range and stable in cleaning effect.
Description
Technical field
The present invention relates to a kind of cleaning agents of membrane, specifically a kind of alkali cleaning combination agent being applicable to inorganic ceramic membrane.
Background technology
At present, during the alkalescence that iron and steel enterprise produces in Rolling production and process for treating oil-containing waste water design, eliminated the traditional handicraft such as chemical demulsification method, gravitational separation process gradually, adopting this kind of novel process of physical-chemical process widely, is again wherein representative with Inorganic Ceramic Membranes.
Inorganic Ceramic Membranes is sieve effect based on porous ceramic medium and the separating substances technology of carrying out, namely under pressure-driven, material liquid inside film pipe film surface with certain flow velocity flow at high speed, small-molecule substance (liquid) along vertical direction with it through microporous barrier, macromolecular substances (solid particle) tunicle retains, and makes fluid reach the object being separated concentrated and purifying.The advantage of inorganic ceramic membrane technology is a lot, and as high temperature resistant, chemical stability is good, and mechanical strength is high, high pressure resistant, and infiltration capacity is large.After but inorganic ceramic membrane runs a period of time, need to carry out cleaning and regeneration to film, recover result of use, increase the service life.
The cleaning process of inorganic ceramic membrane mainly contains pickling, alkali cleaning and rinsing three cleaning steps, and the process of these three kinds cleanings can combine according to actual cleaning performance.The process of pickling mainly removes the inorganic salts of film surface deposition, and the deposit on the rinsing mainly surface of flushing membrane, organic pollution, oleosin etc. on film are mainly cleaned in alkali cleaning.
Alkali cleaning is one of important step of inorganic ceramic membrane cleaning process, and the effect of its cleaning directly can affect the service life of equipment.Alkaline cleaner is roughly containing NaOH, sodium carbonate, surfactant etc.
Prior art also exists following defect:
1, the cleaning agents of membrane generally used in film processing system, be all the ruuning situation according to equipment between limber up period, determine the formula of cleaning agents of membrane, within one period, cleaning performance is unaffected.But the production process of reality is unstable, the character of pollutant can constantly change, and by means of only the adjustment of dosage, not changing formula, is to meet cleaning performance.And this type of formula is only applicable to current film treatment facility, more after transducer set film treatment facility or membrane module, the effect of cleaning also will be greatly affected.This just causes the scope of application of cleaning agents of membrane to limit to, and cleaning performance is unstable;
2, this anionic surfactant of general use neopelex in conventional alkaline cleaner, this composition has the advantages such as functional, cheap.But it has micro-toxicity, the biodegradation rate in sewage-treatment plant is very low, and degraded not exclusively, can cause very large secondary pollution to environment.
3, because of inorganic ceramic membrane kind and pattern is more, the kind of handling object (pollutant) and pollution level change greatly, so often do not have good cleaning performance with the alkaline cleaner of coordinative composition of equipments, the scope of application is limited to.
Summary of the invention
The object of the present invention is to provide a kind of alkali cleaning combination agent being applicable to inorganic ceramic membrane, this alkali cleaning combination agent cleaning performance be better, the scope of application more extensively, environmental protection more.
Object of the present invention can be achieved through the following technical solutions:
Be applicable to an alkali cleaning combination agent for inorganic ceramic membrane, by weight percentage, this alkali cleaning combination agent contains: 54-65% NaOH, 30-43% sodium carbonate, 3-5%DMAD surfactant.
Preferably, described alkali cleaning combination agent contains: 62-65% NaOH, 30-35% sodium carbonate, 3-5%DMAD surfactant.
Described alkali cleaning combination agent using method is: at normal temperatures, using water as solvent, successively solid-state NaOH and sodium carbonate are added in solvent, stir to abundant dissolving until two kinds of raw materials, add liquid DMAD surfactant again, until all raw materials all dissolve and mix.
Beneficial effect of the present invention:
1, alkali of the present invention cleaning combination agent can according to the sewage character of the category of inorganic ceramic membrane and reality, in good time the proportioning of each component in adjustment formula, and relative to traditional cleaning agents of membrane, operation is simpler, and cleaning performance is better;
2, have employed nonionic macromolecule organic DMAD in the present invention as surfactant, not only functional, and be different from dodecyl sodium sulfate, the environmental protection more of this material, easily degrades, and can not cause the secondary pollution of environment;
3, alkali cleaning combination agent of the present invention, by the proportioning of main component in adjustment formula, better all kinds of polluted water of reply and various inorganic ceramic membrane, the scope of application is wider, and cleaning performance is stablized.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described in further detail.
The surfactant that in the present invention, alkali cleaning combination agent contains, have employed a kind of nonionic macromolecule organic DMAD (BULAB8000 series) (United States Patent (USP) Solventrecoveryblendsfromdieneproduction, publication number US7205438B2, publication date on April 17th, 2007), its active component comprises bleeding agent, dispersant etc., this material has hydrophobic and hydrophilic radical concurrently, there is high-effective penetrating and dispersive property, better to removal effects such as organic matter, grease, microorganisms.And being different from the dodecyl sodium sulfate of traditional alkaline cleaner use, this material environmental protection, easily degrades, does not produce secondary pollution.
By specific embodiment of the invention example given below, detailed description is under the sewage condition of the ceramic membrane of different category, heterogeneity and pollution level further, the wash result of alkali cleaning combination agent, by cleaning the contrast of data, represent the effect of cleaning, but they not limitation of the invention.
Example 1: one is applicable to the formula of the conventional cylinder type inorganic ceramic Membrane cleaning combination agent of oily waste water (chemical oil remover pretreatment), and proportioning sees the following form 1.
Example 2: a kind of formula being applicable to the MBR platen surface stripe shape inorganic ceramic Membrane cleaning combination agent of alkaline waste water, proportioning sees the following form 1.
Example 3: one is applicable to the formula of the conventional cylinder type inorganic ceramic Membrane cleaning combination agent of oily waste water (without pretreatment), and proportioning sees the following form 1.
Table 1: the formulation ratio table of example 1-3 alkali cleaning combination agent
Application example 1:
In the design of certain steel plant cold rolling (steel rolling) waster water process, need oily waste water water yield 14m to be processed
3/ h, therefore devising 14 disposal abilities is 1m
3the conventional cylinder type inorganic ceramic membrane of/h.Because this technique is modernization system, leading portion has chemical oil remover to carry out pretreatment, thus oil in waste water and emulsion few, selected proportioning be the NaOH of 62%, the sodium carbonate of 35% and 3% the alkali cleaning combination agent of surfactant.
This alkali cleaning combination agent using method is: at normal temperatures, using water as solvent, successively solid-state NaOH and sodium carbonate are added in solvent, stir to abundant dissolving until two kinds of raw materials, add liquid DMAD surfactant again, until all raw materials all dissolve and mix.It is 5% that water and alkali clean the parameter logistic that combination agent uses, i.e. in the water of 1 cube (1000kg), and the alkali cleaning combination agent containing 5% (50kg).Wherein NaOH is 31kg (50kg*62%), and sodium carbonate is 17.5kg (50kg*35%), and surfactant is 1.5kg (50kg*3%).
The detailed cleaning data of this application example 1 are as following table 2:
Table 2: application example 1 cleans tables of data
Cleaning process have selected two different periods and carries out, and each window duration is about 3 days.After each cleaning is complete, recording film flux data, to run after 8 hours recording film flux again, and repeats " cleaning-run ".
Cleaning performance: after cleaning, membrane flux is generally at 7.5-9m
3between/h, run after 8 hours, membrane flux is at 1.5-3m
3between/h, meet the primary demand of equipment and process completely.
Application example 2:
In the design of certain steel plant's silicon steel (steel rolling) waster water process, alkaline waste water is according to wastewater flow rate 50m
3/ h, devising 3 disposal abilities is 17m
3the MBR platen surface stripe shape inorganic ceramic membrane of/h.In conjunction with oil-containing in alkaline waste water and the less situation of emulsion, this equipment is platen surface stripe shape in addition, have certain difference with the cylinder type of routine, thus selected proportioning be the NaOH of 54%, the sodium carbonate of 43% and 3% surfactant alkali cleaning combination agent.
Alkali cleaning combination agent using method is with application example 1.
The detailed cleaning data of this application example 2 are as following table 3:
Table 3: application example 2MBR ceramic membrane off-line cleaning tables of data
Cleaning performance: can be found out from above-mentioned table 3 by the result of twice pair of MBR ceramic membrane off-line cleaning, before and after cleaning, the vacuum of vavuum pump differs greatly, membrane flux rises obviously, the alkali Membrane cleaning combination agent of this class can meet the cleaning demand of equipment, especially the cleaning of the second period, effect is more stable.
Application example 3:
In the design of certain steel plant's silicon steel (steel rolling) waster water process, the water yield of oily waste water is m
3/ h, devising 2 disposal abilities is 3m
3the conventional cylinder type inorganic ceramic membrane of/h.Because technique does not design pretreatment, so for the oil in waste water and the very high feature of emulsion, formula is adjusted to the NaOH of 65%, the sodium carbonate of 30% and 5% the alkali cleaning combination agent of surfactant.
Alkali cleaning combination agent using method is with application example 1.
The detailed cleaning data of this application example 3 are as following table 4:
Table 4: application example 3 cleans tables of data
Cleaning performance: because this complete equipment just puts into operation, under the impact of the factor such as rated pressure, condition of water quality, membrane flux entirety is higher.After can finding out cleaning from the data of record, membrane flux is generally at 10-15m
3between/h, run after 8 hours, membrane flux still can maintain 5-10m
3between/h, considerably beyond the basic capacity of equipment.
Alkali cleaning combination agent of the present invention, is different from traditional alkaline cleaner, while control dosage, more by the adjustment of composition proportion, reaches best cleaning performance.Wider to the scope of application of film device and pollutant character, cleaning performance also can be protected.Use nonionic macromolecule organic DMAD as surfactant in formula, environmental protection, can not produce secondary pollution.
Invention increases the alkali cleaning scope of application of combination agent and cleaning performance, and traditional alkaline cleaner is also by strengthening dosage, and increases the modes such as alkali cleaning number of times and realize object, but Material Cost and environmental pollution etc. are larger.
In the present invention, surfactant adopts nonionic macromolecule organic DMAD as surfactant, and cleaning performance is better, environmental protection.The surfactant of other formulas, such as fatty glyceride, amino acid pattern etc., also can realize this object, but Material Cost is very high.
Above content is only citing made for the present invention and explanation; affiliated those skilled in the art make various amendment to described specific embodiment or supplement or adopt similar mode to substitute; only otherwise depart from invention or surmount this scope as defined in the claims, protection scope of the present invention all should be belonged to.
Claims (3)
1. be applicable to an alkali cleaning combination agent for inorganic ceramic membrane, it is characterized in that, by weight percentage, this alkali cleaning combination agent contains: 54-65% NaOH, 30-43% sodium carbonate, 3-5%DMAD surfactant.
2. a kind of alkali cleaning combination agent being applicable to inorganic ceramic membrane according to claim 1, it is characterized in that, described alkali cleaning combination agent contains: 62-65% NaOH, 30-35% sodium carbonate, 3-5%DMAD surfactant.
3. a kind of alkali cleaning combination agent being applicable to inorganic ceramic membrane according to claim 1 and 2, it is characterized in that, described alkali cleaning combination agent using method is: at normal temperatures, using water as solvent, successively solid-state NaOH and sodium carbonate are added in solvent, stir to abundant dissolving until two kinds of raw materials, then add liquid DMAD surfactant, until all raw materials all dissolve and mix.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106215705A (en) * | 2016-08-25 | 2016-12-14 | 嘉兴赛维环保科技有限公司 | A kind of Tea Bag Paper paper waste pollutes the comprehensive cleaning method of materialization of filter membrane |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1973970A (en) * | 2006-11-03 | 2007-06-06 | 上海印钞厂 | Scavenger for ultrafiltering ceramic membrane and its prepn and application |
| CN104130806A (en) * | 2014-08-01 | 2014-11-05 | 安徽欣创节能环保科技股份有限公司 | Coke oven gas delivery system chemical additive and preparation method thereof |
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2015
- 2015-11-13 CN CN201510783802.9A patent/CN105251368A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1973970A (en) * | 2006-11-03 | 2007-06-06 | 上海印钞厂 | Scavenger for ultrafiltering ceramic membrane and its prepn and application |
| CN104130806A (en) * | 2014-08-01 | 2014-11-05 | 安徽欣创节能环保科技股份有限公司 | Coke oven gas delivery system chemical additive and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106215705A (en) * | 2016-08-25 | 2016-12-14 | 嘉兴赛维环保科技有限公司 | A kind of Tea Bag Paper paper waste pollutes the comprehensive cleaning method of materialization of filter membrane |
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Application publication date: 20160120 |
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